Your claims stand against published results for an industry standard benchmark, are based on your personal experience with system configurations and applications you choose to provide no information on and supposedly backed by proof you refuse to refer to. Hardly a good position for an argument. I'm sure that there will be an abundance of OpenGL 2.0 performance benchmarks in due time, however, and I am quite content to let the matter rest until then.

In any case, the Via KT800 is supported by Linux AGPGART and, if memory serves me right, has been reported to work with NVIDIA cards/drivers on both Linux/x86 and Linux/x86-64 kernels. To the best of my knowledge, 3Dlabs provides no Linux/x86-64 driver, which 3Dlabs driver release and Linux kernel are you using?